OK, I did the experiment. Using skanlite, I scanned the document, when it was finished I clicked "save", and I named it "20191124-0001" and saved it. Then I clicked "preview" and it prepared to scan again, and I clicked "scan" and when it was finished I clicked "save", and it offered to save the scan with the filename "20191124-0002". So, there you go. Not exactly automated scanning, but it will number the files sequentially.